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Summary Of Significant Accounting Policies (Schedule of Components of Investments) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Summary Of Significant Accounting Policies [Line Items] |  |
Investments | $ 402 | $ 12
Catalyst [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
% Interest | 50.00% |
Investments | $ 368 |
Other [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Investments | $ 34 |

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- Definition Sum of the carrying amounts as of the balance sheet date of all investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(h)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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